How many amino acids constitute a dipeptide?

A dipeptide is defined as a molecule composed of two amino acids linked together by a peptide bond. Peptide bonds form through a dehydration synthesis reaction between the amino group of one amino acid and the carboxyl group of another, resulting in the release of a water molecule. Therefore, the correct response highlights that a dipeptide specifically consists of exactly two amino acids, which is fundamental in biochemistry and the study of proteins. Understanding this concept is essential as peptides and proteins play critical roles in biological processes.